AES Show: Make the Right Connections Audio Engineering Society

AES San Francisco 2008
Exhibitor Seminar ES3

Friday, October 3, 1:00 pm — 2:00 pm

ES3 - THAT Corporation

Rosalfonso Bortoni
Fred Floru
Bob Moses
Les Tyler

Honey, I Shrunk the Power Supply—Analog Audio in a Low-Voltage, Single-Supply World

Moore’s Law ushered in an era of enormous digital signal processing power as semiconductor geometries shrank to sub-micron levels. But with this came shrinking power supplies. Today, digital logic often requires multiple low-voltage power supplies such as 1.8V, 3.3V, and 5V. Along with these, do we really have to generate +/-15V supplies for high-performance analog? Moreover, while wall-warts are handy for avoiding regulatory issues, they typically provide only one polarity of one voltage. This seminar will show designers how to operate conventional high-voltage dual-supply analog audio ICs from single-voltage supplies. We will explore active and passive rail-splitting, minimum required supply voltages, gain structure, and optimal input/output termination.